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Publication date
Priority claimed from GB23275/74Aexternal-prioritypatent/GB1503915A/en
Priority claimed from AT3976Aexternal-prioritypatent/AT343744B/en
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of ATA785376ApublicationCriticalpatent/ATA785376A/en
Application grantedgrantedCritical
Publication of AT346367BpublicationCriticalpatent/AT346367B/en